Hey guys, does anyone have any recommendations please for companies offering Community Management/Marketing services? I'm quite price conscious, so if you know which ones are cheaper/expensive/how much they charge, for a small/medium sized developer? Thanks 

I highly suggest “Max Louis Creative”. They have a full team of social media, marketing, web designers and graphic designers. They can cover every aspect of marketing and the owner, Max, is very down to earth and will personally work with you to deliver exactly what you want. 

https://maxlouiscreative.com/social-media-management/

Find companies to cooperate. They provide users, you provide products.